<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类管理</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert
        title="注意：只允许为第三级分类设置相关参数！"
        type="warning"
        show-icon
      >
      </el-alert>
      <el-row class="cat_opt">
        <el-col>
          <span>选中商品分类：</span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
            v-model="selectedCatekeys"
            :options="catelist"
            :props="cateProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- 页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handTabClick">
        <!-- 添加动态参数的面板 -->
        <el-tab-pane label="动态参数" name="many">
          <!-- 添加参数的按钮 -->
          <el-button
            type="primary"
            :disabled="isBtnDisabled"
            size="mini"
            @click="addDialogVisible = true"
            >添加参数</el-button
          >
          <!-- 动态参数的表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                >
                  {{ item }}
                </el-tag>
                 <!-- 循环渲染Tag标签 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                 <!-- 添加的按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index" label="#"></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                  >修改</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性的面板 -->
        <el-tab-pane label="静态属性" name="only">
          <!-- 添加属性的按钮 -->
          <el-button
            type="primary"
            :disabled="isBtnDisabled"
            size="mini"
            @click="addDialogVisible = true"
            >添加属性</el-button
          >
          <!-- 静态属性的表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
               <template slot-scope="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                >
                  {{ item }}
                </el-tag>
                 <!-- 循环渲染Tag标签 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                 <!-- 添加的按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index" label="#"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                  >修改</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数的对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 添加参数对话框 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改参数的对话框 -->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="showDialogVisible"
      width="50%"
      @close="showDialogClosed"
    >
      <!-- 添加参数对话框 -->
      <el-form
        :model="showForm"
        :rules="showFormRules"
        ref="showFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="showForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer">
        <el-button @click="showDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="showParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>


<script>
export default {
  data() {
    return {
      //商品分类列表
      catelist: [],
      //   级联选择框的配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
      },
      //级联选择框双向绑定到的数组
      selectedCatekeys: [],
      //被激活的页签名称
      activeName: 'many',
      //动态参数的数据
      manyTableData: [],
      //静态属性的数据
      onlyTableData: [],
      //控制添加对话框的显示和隐藏
      addDialogVisible: false,
      //添加参数的表单数据对象
      addForm: {
        attr_name: '',
      },
      //添加表单的验证规则对象
      addFormRules: {
        attr_name: [
          { required: true, message: `请输入属性名称`, trigger: 'blur' },
        ],
      },
      //控制修改对话框的隐藏和显示
      showDialogVisible: false,
      //修改数组对象
      showForm: {},
      //修改表单的验证规则对象
      showFormRules: {
        attr_name: [
          { required: true, message: `请输入属性名称`, trigger: 'blur' },
        ],
      },
      //控制按钮文本框的隐藏和显示
      inputVisible:false,
      //文本中输入的内容
      inputValue:''
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //所有商品分类列表
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status != 200) return this.$message.error('获取数据失败！')
      this.catelist = res.data
      console.log(this.catelist)
    },
    //级联选择框选中项变化，会触发这个函数
    handleChange() {
      this.getParamsData()
    },
    handTabClick() {
      console.log(this.activeName)
      this.getParamsData()
    },
    async getParamsData() { 
      //证明选中的不是三级分类
      if (this.selectedCatekeys.length != 3) {
        this.selectedCatekeys = []
        this.manyTableData=[]
        this.onlyTableData=[]
        return
      }
      //证明选中的是三级分类
      console.log(this.selectedCatekeys)
      //根据所选分类的id和当前所处的面板 获取对应的参数
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: this.activeName },
        }
      )
      if (res.meta.status != 200) return this.$messaeg.error('获取参数失败！')

      res.data.forEach((item) => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        //控制文本框的显示与隐藏
        item.inputVisible=false
        //文本中输入的值
        item.inputValue=''
      })
      console.log(res.data)
      if (this.activeName == 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    //监听添加对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    //点击按钮，添加参数
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName,
          }
        )
        if (res.meta.status != 201) {
          return this.$message.error('添加参数失败！')
        }
        this.$message.success('添加参数成功！')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    // 点击按钮展示修改的按钮
    async showEditDialog(attr_id) {
      //查询当前参数的信息
      const {
        data: res,
      } = await this.$http.get(
        `categories/${this.cateId}/attributes/${attr_id}`,
        { params: { attr_sel: this.activeName } }
      )
      if (res.meta.status != 200) return this.$message.error('获取参数失败！')
      this.showForm = res.data
      this.showDialogVisible = true
    },
    //重置修改的表单
    showDialogClosed() {
      this.$refs.showFormRef.resetFields()
    },
    //点击按钮，修改参数信息
    showParams() {
      this.$refs.showFormRef.validate(async (valid) => {
        if (!valid) return
        const {
          data: res,
        } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.showForm.attr_id}`,
          { attr_name: this.showForm.attr_name, attr_sel: this.activeName }
        )
        if (res.meta.status != 200) return this.$message.error('修改参数失败！')
        console.log(1)
        this.$message.success('修改参数成功！')
        this.getParamsData()
        this.showDialogVisible = false
      })
    },
    //根据id 删除对应的参数项
    async removeParams(attr_id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该参数, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      //用户取消了删除
      if (confirmResult != 'confirm') {
        return this.$message.error('取消了删除！')
      }
      //删除的业务逻辑
      const { data: res } = await this.$http.delete(
        `categories/${this.cateId}/attributes/${attr_id}`
      )
      if (res.meta.status != 200) return this.$message.error('删除失败！')
      this.$message.success('删除成功！')
      this.getParamsData()
    },
    // 文本失去焦点，或摁下 Enter 都会触发
    handleInputConfirm(row){
           if(row.inputValue.trim().length ===0 ){
             row.inputValue=''
             row.inputVisible =false
             return 
          }
          //如果没有return 则证明输入的内容 需要后续处理
          row.attr_vals.push(row.inputValue.trim())
          row.inputValue=''
          row.inputVisible=false
          this.saveAttrVales(row)
    },
    async  saveAttrVales(row){
      //需要发起请求，保存这次操作
          const {data:res}=await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
            attr_name:row.attr_name,
            attr_sel:row.attr_sel,
            attr_vals:row.attr_vals.join(' ')
          })
          if(res.meta.status != 200)return this.message.error('修改失败！')
          this.$message.success('修改成功！')
    },
    showInput(row){
        row.inputVisible = true
        //让文本框自动获得焦点
        // $nextTick 方法的作用 就是当页面上元素被重新渲染后，才会执行回调函数中的代码
          this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
    },
    //删除对应的参数可选项
    handleClose(i,row){
     row.attr_vals.splice(i,1)
     this.saveAttrVales(row)
    }
  },
  computed: {
    //如果按钮 需要被禁用，则返回true 反之 返回false
    isBtnDisabled() {
      if (this.selectedCatekeys.length != 3) return true
      return false
    },
    //当前选中的三级分类id
    cateId() {
      if (this.selectedCatekeys.length === 3) return this.selectedCatekeys[2]
      return null
    },
    //动态计算标题的文本
    titleText() {
      if (this.activeName == 'many') return '动态参数'
      return '静态属性'
    },
  },
}
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag {
  margin-right: 10px;
}
.el-input{
  width: 150px;
}
</style>